/Engine/Plugins/Runtime/Metasound/Source/MetasoundFrontend/Public/MetasoundFrontendController.h
Returns the node interface, which may be different than the class interface if the class supports dynamic input/output behavior (ex. Templates).
const [FMetasoundFrontendNodeInterface](API\Plugins\MetasoundFrontend\FMetasoundFrontendNodeInterface) & GetNodeInterface() const